Remove multiple dashboards feature flag

Displaying multiple dashboard dropdown is behind
environment_metrics_show_multiple_dashboards feature flag.
Removing it in this MR along with specs

app/assets/javascripts/monitoring/components/dashboard.vue

@@ -175,7 +175,6 @@ export default {
       'metricsWithData',
       'useDashboardEndpoint',
       'allDashboards',
-      'multipleDashboardsEnabled',
       'additionalPanelTypesEnabled',
     ]),
     firstDashboard() {
@@ -318,7 +317,6 @@ export default {
       <div class="row">
         <template v-if="environmentsEndpoint">
           <gl-form-group
-            v-if="multipleDashboardsEnabled"
             :label="__('Dashboard')"
             label-size="sm"
             label-for="monitor-dashboards-dropdown"

app/assets/javascripts/monitoring/monitoring_bundle.js

@@ -14,7 +14,6 @@ export default (props = {}) => {
     if (gon.features) {
       store.dispatch('monitoringDashboard/setFeatureFlags', {
         prometheusEndpointEnabled: gon.features.environmentMetricsUsePrometheusEndpoint,
-        multipleDashboardsEnabled: gon.features.environmentMetricsShowMultipleDashboards,
         additionalPanelTypesEnabled: gon.features.environmentMetricsAdditionalPanelTypes,
       });
     }

app/assets/javascripts/monitoring/stores/actions.js

@@ -37,10 +37,9 @@ export const setEndpoints = ({ commit }, endpoints) => {
 
 export const setFeatureFlags = (
   { commit },
-  { prometheusEndpointEnabled, multipleDashboardsEnabled, additionalPanelTypesEnabled },
+  { prometheusEndpointEnabled, additionalPanelTypesEnabled },
 ) => {
   commit(types.SET_DASHBOARD_ENABLED, prometheusEndpointEnabled);
-  commit(types.SET_MULTIPLE_DASHBOARDS_ENABLED, multipleDashboardsEnabled);
   commit(types.SET_ADDITIONAL_PANEL_TYPES_ENABLED, additionalPanelTypesEnabled);
 };
 
@@ -51,13 +50,8 @@ export const setShowErrorBanner = ({ commit }, enabled) => {
 export const requestMetricsDashboard = ({ commit }) => {
   commit(types.REQUEST_METRICS_DATA);
 };
-export const receiveMetricsDashboardSuccess = (
-  { state, commit, dispatch },
-  { response, params },
-) => {
-  if (state.multipleDashboardsEnabled) {
-    commit(types.SET_ALL_DASHBOARDS, response.all_dashboards);
-  }
+export const receiveMetricsDashboardSuccess = ({ commit, dispatch }, { response, params }) => {
+  commit(types.SET_ALL_DASHBOARDS, response.all_dashboards);
   commit(types.RECEIVE_METRICS_DATA_SUCCESS, response.dashboard.panel_groups);
   dispatch('fetchPrometheusMetrics', params);
 };

app/assets/javascripts/monitoring/stores/mutation_types.js

@@ -10,7 +10,6 @@ export const RECEIVE_ENVIRONMENTS_DATA_FAILURE = 'RECEIVE_ENVIRONMENTS_DATA_FAIL
 export const SET_QUERY_RESULT = 'SET_QUERY_RESULT';
 export const SET_TIME_WINDOW = 'SET_TIME_WINDOW';
 export const SET_DASHBOARD_ENABLED = 'SET_DASHBOARD_ENABLED';
-export const SET_MULTIPLE_DASHBOARDS_ENABLED = 'SET_MULTIPLE_DASHBOARDS_ENABLED';
 export const SET_ADDITIONAL_PANEL_TYPES_ENABLED = 'SET_ADDITIONAL_PANEL_TYPES_ENABLED';
 export const SET_ALL_DASHBOARDS = 'SET_ALL_DASHBOARDS';
 export const SET_ENDPOINTS = 'SET_ENDPOINTS';

app/assets/javascripts/monitoring/stores/mutations.js

@@ -89,9 +89,6 @@ export default {
   [types.SET_DASHBOARD_ENABLED](state, enabled) {
     state.useDashboardEndpoint = enabled;
   },
-  [types.SET_MULTIPLE_DASHBOARDS_ENABLED](state, enabled) {
-    state.multipleDashboardsEnabled = enabled;
-  },
   [types.SET_GETTING_STARTED_EMPTY_STATE](state) {
     state.emptyState = 'gettingStarted';
   },

app/assets/javascripts/monitoring/stores/state.js

@@ -8,7 +8,6 @@ export default () => ({
   deploymentsEndpoint: null,
   dashboardEndpoint: invalidUrl,
   useDashboardEndpoint: false,
-  multipleDashboardsEnabled: false,
   additionalPanelTypesEnabled: false,
   emptyState: 'gettingStarted',
   showEmptyState: true,

app/controllers/projects/environments_controller.rb

@@ -12,7 +12,6 @@ class Projects::EnvironmentsController < Projects::ApplicationController
   before_action :expire_etag_cache, only: [:index]
   before_action only: [:metrics, :additional_metrics, :metrics_dashboard] do
     push_frontend_feature_flag(:environment_metrics_use_prometheus_endpoint, default_enabled: true)
-    push_frontend_feature_flag(:environment_metrics_show_multiple_dashboards)
     push_frontend_feature_flag(:environment_metrics_additional_panel_types)
     push_frontend_feature_flag(:prometheus_computed_alerts)
   end
@@ -168,7 +167,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
         dashboard_path: params[:dashboard],
         **dashboard_params.to_h.symbolize_keys
       )
-    elsif Feature.enabled?(:environment_metrics_show_multiple_dashboards, project)
+    else
       result = dashboard_finder.find(
         project,
         current_user,
@@ -177,8 +176,6 @@ class Projects::EnvironmentsController < Projects::ApplicationController
       )
 
       result[:all_dashboards] = dashboard_finder.find_all_paths(project)
-    else
-      result = dashboard_finder.find(project, current_user, environment: environment)
     end
 
     respond_to do |format|

ee/changelogs/unreleased/28856-remove-environment_metrics_show_multiple_dashboards-feature-flag.yml

+---
+title: Remove environment_metrics_show_multiple_dashboards feature flag
+merge_request: 16640
+author:
+type: changed

spec/controllers/projects/environments_controller_spec.rb

@@ -483,10 +483,8 @@ describe Projects::EnvironmentsController do
     end
 
     shared_examples_for 'the default dashboard' do
-      all_dashboards = Feature.enabled?(:environment_metrics_show_multiple_dashboards)
-
       it_behaves_like '200 response'
-      it_behaves_like 'includes all dashboards' if all_dashboards
+      it_behaves_like 'includes all dashboards'
 
       it 'is the default dashboard' do
         get :metrics_dashboard, params: environment_params(dashboard_params)
@@ -618,16 +616,6 @@ describe Projects::EnvironmentsController do
     it_behaves_like 'the default dashboard'
     it_behaves_like 'dashboard can be specified'
     it_behaves_like 'dashboard can be embedded'
-
-    context 'when multiple dashboards is disabled' do
-      before do
-        stub_feature_flags(environment_metrics_show_multiple_dashboards: false)
-      end
-
-      it_behaves_like 'the default dashboard'
-      it_behaves_like 'dashboard cannot be specified'
-      it_behaves_like 'dashboard can be embedded'
-    end
   end
 
   describe 'GET #search' do

spec/javascripts/monitoring/components/dashboard_spec.js

@@ -527,7 +527,6 @@ describe('Dashboard', () => {
 
       component.$store.dispatch('monitoringDashboard/setFeatureFlags', {
         prometheusEndpoint: false,
-        multipleDashboardsEnabled: true,
       });
 
       component.$store.commit(

spec/javascripts/monitoring/store/actions_spec.js

@@ -240,8 +240,6 @@ describe('Monitoring store actions', () => {
       const response = metricsDashboardResponse;
 
       response.all_dashboards = dashboardGitResponse;
-      state.multipleDashboardsEnabled = true;
-
       receiveMetricsDashboardSuccess({ state, commit, dispatch }, { response, params });
 
       expect(commit).toHaveBeenCalledWith(types.SET_ALL_DASHBOARDS, dashboardGitResponse);